tablet you take every day, so you can be ready anytime the moment is right. tell your doctor about your medical condition and all medications and ask if you're healt enough for sexual activity. don't take cialis if you take nitrates for chest pain, as this may cause an unsafe drop in blood pressure. don't drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long term injury seek immediate medical help for an erection lasting more than 4 hours. if you have any sudden decrease oross in hearing or vision stop taking cialis and call your doctor right away. announcer: cialis for daily use or 36-hour cialis. ask your doctor if cialis is right for you, so when the moment is right, you can be ready.